DesignPattern-AbstractFactory

抽象工厂模式

 

定义：

    抽象工厂模式提供一个接口，用于创建相关或依赖对象的家族，而不需要明确指定具体类。

 

ClassDiagram:

 

图中，是强调CheeseStore的原料Ingredient选择的抽象工厂，四种原料来自南北两方。

 

 

PizzaIngredientFactory.h

#if !defined(_PIZZAINGREDIENTFACTORY_H)
#define _PIZZAINGREDIENTFACTORY_H
#include "Dough.h"
#include "Sauce.h"
#include "Cheese.h"
#include "Clam.h"

class PizzaIngredientFactory
{
public:
    virtual Dough* createDough() = 0;
    virtual Sauce* createSauce() = 0;
    virtual Cheese* createCheese() = 0;
    virtual Clam* createClam() = 0;
};

#endif //_PIZZAINGREDIENTFACTORY_H

NorthCheesePizzaIngredientFactory.h

#if !defined(_NORTHCHEESEPIZZAINGREDIENTFACTORY_H)
#define _NORTHCHEESEPIZZAINGREDIENTFACTORY_H

#include "PizzaIngredientFactory.h"
#include "Dough.h"
#include "Sauce.h"
#include "Cheese.h"
#include "Clam.h"
class NorthCheesePizzaIngredientFactory : public PizzaIngredientFactory
{
public:
    Dough* createDough();
    Sauce* createSauce();
    Cheese* createCheese();
    Clam* createClam();
};

#endif //_NORTHCHEESEPIZZAINGREDIENTFACTORY_H

Cheese.h

#if !defined(_CHEESE_H)
#define _CHEESE_H


class Cheese
{
};

#endif //_CHEESE_H

NorthCheese.h

#if !defined(_NORTHCHEESE_H)
#define _NORTHCHEESE_H

#include "Cheese.h"

class NorthCheese : public Cheese
{
public:
    NorthCheese();
};

#endif //_NORTHCHEESE_H

CheesePizzaStore.h

#if !defined(_CHEESEPIZZASTORE_H)
#define _CHEESEPIZZASTORE_H
#include <string>

using namespace std;

class CheesePizzaStore
{
public:
    void createPizza(string type);
};

#endif //_CHEESEPIZZASTORE_H

CheesePizzaStore.cpp

#include "stdafx.h"
#include "CheesePizzaStore.h"

#include "NorthCheesePizzaIngredientFactory.h"
#include "SouthCheesePizzaIngredientFactory.h"
#include "PizzaIngredientFactory.h"
void CheesePizzaStore::createPizza(string type)
{
    PizzaIngredientFactory* pf;
    if (type == "North")
    {
        pf = new NorthCheesePizzaIngredientFactory();
    }
    else if(type == "South")
    {
        pf = new SouthCheesePizzaIngredientFactory();
    }

    pf->createCheese();
    pf->createClam();
    pf->createDough();
    pf->createSauce();

}

Test.cpp

#include "stdafx.h"
#include "CheesePizzaStore.h"
#include "NorthCheesePizzaIngredientFactory.h"
#include "SouthCheesePizzaIngredientFactory.h"
#include "PizzaIngredientFactory.h"
int main(int argc, char* argv[])
{
    printf("Hello World!\n");

    CheesePizzaStore* cps = new CheesePizzaStore();
    cps->createPizza("North");
    printf("\n----------------------------\n");
    cps->createPizza("South");
    printf("\n");
    return 0;
}

Output:

Hello
NorthCheese.NorthClam.NorthDough.NorthSauce.
----------------------------
SouthCheese.SouthClam.SouthDough.SouthSauce.
Press any key to continue

完整的项目源码，VC6.0工程。

 AbstractFactory.rar